Device for removing ashes



v April 4, 1939. G. SCHWABACH 2,153,276

DEVICE FOR REMOVING ASHES Filed July 24, 1936' 4 Sheets-Sheet 1 /nveht0r5 Genre Shwaba=h April 1939- G. SCHWABACH 2,153,276

DEVICE FOR REMOVING ASHES Filed July 24, 1956 45heets-Sheet 2 /nvent0r:PB G'eorg Schwoback ATTy,

April 4, 1939. a. SCHWABACH DEVICE FOR REMOVING ASHES Filed July 24,1936 4 Sheets-Sheet 3 /nventor.' 60ers Schulz hawk April 1939- G.SCHWABACH 2,153,276

DEVICE FOR REMOVING ASHES Filed July 24, 1936 4 Sheets-Sheet 4 Inventor:Georg Se/iwabach Patented Apr. 4, 1939 UNITED STATES DEVICE FOR REMOVINGASHES Georg Schwabach, Berlin-Charlottenburg,

Germs Application In 30laims.

tube or branch extending downwards below the level of the water.

It is an object of my invention to provide means for discharging theashes, cinders, etc., from the water-filled trough.

It has been proposed to provide scraping-"chains in order to dischargethe ashes from a trough of the kind referred to. Such chains however aresubjected to considerable wear. Besides this the known devices involvesome other drawbacks such as the necessity of increasing the dimensionof the trough because the tubes leading the ashes into the trough mustbe arranged with their discharge openings below the water-level andabove the chains.

It is an object of my invention to provide an improved dischargingdevice for withdrawing the ashes from the water-filled trough. AccordingQ to my invention a screw is arranged in the trough, as dischargingmeans, this screw being designed as a conveying screw adapted todischarge-the ashes from the trough or being connected to a separatedischarging device driven by the screw. In the drawings, fixed to thisspecification and forming-part thereof, some embodiments of my inventionare diagrammatically illustrated by way of example.

In thedrawings J Fig. 1 shows a trough provided with a horizon-- talconveying screw and an upward inclined screw in order to withdraw theashes from the trough.

Figs. 2-4 show similar embodiments of my invention comprising twoconveying screws but with modified means for coupling the screws.

Fig. 5 is a side elevation partly in section of 'another embodiment ofmy invention comprising two conveying screws coupled by means of bevelgear wheels. '3

Fig. 6 is an end elevation of the device shown in Fig. 5, seen in thedirection of the arrow A.

Figs. 7 and 8 illustrate another embodiment of the device shown in Fig.5, modified in regard to the coupling of the screws.

Figs. 9 and 10 are a side elevation and a plan view, respectively,partly in section of another embodiment of my invention, comprising twoconveying screws, whereby both conveying screws are driven by means oftwo connected drivins shafts, which are arranged outside of the trough.

Fig. 11 is a side elevation. partly in section, of a modified embodimentof the invention shown 'another embodiment of my Jill! 24, 1936, SerialNO. 92331 Germany July 29, 1935 in Fig. 9, only the right-hand end ofthe device being shown.

Fig. 12 is a section inside the end of the device shown in Fig. 11, seenin the direction of the arrow B.

Fig. 13 is a plan view. partly in section of an embodiment similar tothe device shown in Figs. 9 and 10, differing from that device in usinga driving chain instead of driving shafts.

Fig. 14 is a. side elevation, partly in section, of 1 invention inwhich. the end-portion of the screw is shaped so as to discharge theashes, etc., from the trough.

Flg. 15 is a section on the line A-B of Fig. 14.

Figs. 16 and 17 are corresponding views of an- 18 other embodiment of myinvention, Fig. 17 being a section on the line OD of Fig. 16.

Fig. 18 is a side elevation, partly in section, of another embodiment ofmy invention and Fig. 19 is a section on the line E-F of Fig. 18. 20'

Fig. 20 is a side elevation, partly in section, of another embodiment ofmy invention and Fig. 21 is a front elevation, partly in section, alongthe line G-H of Fig. 20.

Fig. 22 is a side elevation, partly in section, of 25 another embodimentof my invention and Fig. 23 is a corresponding front elevation of thedevice shown in Fig. 22.

Referring now to the drawings and first to. Fig. l, l is a trough filledwith water up to the 30 level indicated in Fig. 1, which is to serve asa conveying channel. I is an ash-tube extending downwards beyond thelevel of the water into the trough i through which ashes are led to thetrough, so that they will assembleon the bottom 35' of the trough withinthe body of the water. The

bottom of the trough is shaped cylindrically such as shown for instancein Figs. 6, 12, 15. 3 is a conveying screw horizontally arranged inthetrough. 'Ihe screw is preferably 'bent from a 40 ribbon of metal so asto be devoid of a shaft. The diameter of the screw corresponds to thatof the cylindrical bottom of the trough, so that the edges of the bladesof the screw are spaced -a very small distance from the bottom of the 45are conveyed by the screw 3 towards the inclined portion 3 and here theyare taken up by the inclined screw 3 and discharged from the trough.

Fig. 2 shows a modified coupling between the screws 3 and 3. To the end3a of the horizontal screw 3 a pin 3 is fastened projectingsubstantially normally from the front surface of the screwend 3a. Thispin engages a hole 9 in the screwend 3a of the inclined screw 3, thediameter of the hole 9 being slightly larger than that of the pin 3.Both screw-ends 3a, 3a are somewhat spaced apart from one another sothat the pin 3 will transmit the rotation of the screw 3 to the inclinedscrew 3, thereby periodically sliding in the hole 9 in an axialdirection. The end positions of the screws 3, 3 and the pin 8 withrespect to the hole 9 are shown in Fig. 2 in full and dotted lines,respectively.

In the embodiment shown in Fig. 3 the screws 3 and 3 are coupled bymeans of a device similar to a dog-clutch. To this end the screw 3 isprovided at its end with an annular member Ill carrying a row of dogs IIuniformly distributed along its periphery. The screw 3 is provided witha similar annulus I2 carrying dogs l3. The annulus I2 is inclined withrespect to the annulus I0 so that at every position of the screws onlythe dogs at the most elevated portions of the annuli engage each other.Preferably the number of the dogs II exceeds that of the dogs I3slightly, e. g. by one. The dogs II transmit the rotation of the screw 3to the dogs I3 and thus to the screw 3.

In Fig. 4 the screws 3 and 3 are provided with similar annuli I3 and I2carrying dogs II and I3, respectively. The dogs II and I3 however arenot in direct engagement, but engage dogs I4 and I3, respectively,arranged on opposite sides of a disk I3 secured to a shaft I'l driven bysuitable means (not shown). Thus in this embodiment both the screws 3and 3 are driven from the shaft I! in order to avoid use of furtherdriving means. Preferably in this embodiment the members of the dogs areso chosen that the screw 3 rotates at a slightly higher speed than thescrew 3.

Referring now to Figs. 5 and 6, the screws 3, 3 are coupled with eachother in similar manner as in Fig. 3, the screw 3 being driven by amotor I3. The disks I3. I2 with the dogs II, I3 are replaced by bevelgear wheels I3, 23. engaging each other with their top portions at 2|.As will be seen from Fig. 5 the engaging portions of the bevel gearwheels are situated above the level of the water. It will be understoodthat in the embodiment shown in Figs. 3 and 4 the single members of thedevices may be dimensioned in such man- .ner that the engaging dogs II,13, I4, II are situated above the level of the water.

The tubes 2a through which the ashes are led to the trough I in Fig. 6may be arranged with their orifices in the side walls 22, 23 of thetrough I below the level of the water.

In order to secure a proper engagement of the. wheels l9 and 23 at 2| acompression spring 24 is provided exerting a pressure on the inclinedscrew 3 in the direction of the axis thereof. The strength of the spring24 is so chosen that the screw 3 may yield In the event that largecinder particles enter the space between the teeth of the wheels l9 and23. If desired, conically shaped friction wheels 23, 23 may be providedinstead of the toothed wheels I3, 23. Embodiments com-. prising frictionwheels of this kind are shown in Figs. 7 and 8 which are similar to theembodiment shown in Fig. 4 in that the screws 3 and 3 are driven bymeans of a driving member 21 engaging the friction wheels 23 and 23secured to the screws 3 and 3, respectively.

In the embodiment shown in Fig. '7 the axis 23 of the driving member 21is arranged horizontally, the wheel being provided with two conicallyshaped friction surfaces 21a and 21b. In the embodiment shown in Fig. 8the axis 29 of the driving member 21 is arranged vertically and isdirectly driven by the motor I 3a. It should be understood, however,that also in these embodiments toothed wheels may be provided instead ofthe friction wheels. Also in these embodiments an axial pressure isexerted on the inclined screw 3 by'means of a spring 24 which, however,in these embodiments,- is arranged outside of the inclined portion 6 ofthe trough.

Referring now to Figs. 9 and 10 an embodiment is shown in which thecoupling means of the conveying screws 3 and 3 are arranged outside ofthe trough I. The motor l8 drives a horizontally arranged shaft 30 whichin turn drives an inclined shaft 3| by means of a suitable coupling 32,these members being arranged adjacently to a side wall 22 of the troughl and being supported by suitable bearings 33 connected to the trough I.34 is a chain wheel or the like connected by means of a chain 33 to achain wheel 33 secured to the shaft 31 of the screw 3. 33 is a chainwheel secured to the shaft 3| and driving by means of a chain 39 a chainwheel 43 secured to the shaft 4| of the inclinedscrew 3. By suitablychoosing the diameters of the chain wheels the speed of the inclinedscrew 3 may be made slightly higher than that of the screw 3, so thataccumulation of the ashes at the end of the horizontal screw 3 will beavoided. I

In the embodiments shown in Figs. 11 and 12 which are substantiallysimilar to those shown in Figs. 9 and 10 the driving shafts such as 30and the chain wheels such as 34 and 33 are arranged within the trough I,the shaft 30 and the chain wheel 34 being situated above the level ofthe water. By doing so stufllng boxes for the shafts of the screws atthe end walls of the trough I may be dispensed with. 42 are rollersengaging the upper portions of the screw 3 and preventing a rising ofthe screw. Referring now to Fig. 13 the screws are driven by means ofbevel gears 43, 44 and 43, 43, re-

spectively. The bevel gear wheel 43 is directly secured to the shaft 41of the motor I3 whereas the bevel gear wheel 43 is driven by means of achain gear comprising a chain wheel 48 secured to the shaft of the motorI 3, a chain 49 and a chain wheel 3| secured to the shaft 33 of thebevel gear wheel 43. Also in this embodiment the screw 3 may be drivenat a higher speed than the screw 3 by suitably choosing the ratios ofthe bevel gears of the diameters of the chain wheels.

Referring now to Figs. 14 and 15 the inclined screw 3 shown in Figs. 1to 13 is dispensed with.

' In order to discharge the ashes from the trough .the screw-end of theconveying screw 3 is shaped the mutual position of nel part. la, inwhich the ashes are discharged from the trough I (as will be seen fromFig. 17). The screw-end is shaped as a shovel 53 carrying at its frontend a disk 54 connected to the shovel 53 nearits periphery. 55 isanother shovel secured to the disk 54 opposite to the shovel 53, theshovels being shown in Figs. 16 and 17. when the screw 3 is driven theshovels 53 and 55 co-operate in forcing the ashes upwards along theinclined wall-portion 23a of the trough I so that the ashes will bedischarged.

Referring now to Figs. 18 and 19 two screws 3 and 3' are providedconveying in opposite directions as indicated by the facing one anotherwith their discharging ends. The screw-ends are shaped as shovels 56 and51, respectively, the shovels being secured to a disk 58 carryingadditional shovels 59. The bottom of the trough I forms a sump 60 belowthe disk58' and the shovels 55 and 51 as shown in Fig. 18. Themid-portion 22a of the side wall of the trough I is inclined as shown inFig. 19. The operation of the device is substantially the same as thatof the device shown in Figs. 16 and 17.. It will be understood that onlyone of the screws land 3' must be driven by a driving motor,

' ashes extended front portion not shown, the other screw 3' receivingits drive from the first screw 3. I

Referring now to Figs. 20 and 21 showing a device adapted for conveyingbig amounts of or to raise the ashes to a greater height, the front-endof the screw 3 is connected-to a diskiil carrying shovels 62 similar tovanes, by which the ashes collecting in the downwardly Ia of the troughI are directed to an inclined chute 54. Preferably the side wall of the'chute 54 is curved as shown at 85, in order to prevent the ashesconveyed by the rising vanes from sliding-back into the trough.

Finally, in the embodiment shown in Figs. 22

and 23 the discharging device is designed as a chain 55 driven by achain wheel 61 secured to the conveying screw 3. The chain wheel 51 isprovided with an opening Oil through which the arrows (Fig. 18) and thescrew 3 pass into the trough from which they suitable cups ll seashesconveyed by front porton 59 of the are withdrawn by means of cured tothe chain 56.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

I claim:

l. A device for quenching ashes, cinders, slag and the like dischargedfrom a furnace comprising in combination a down-pipe, a trough disposedbelow said down'-pipe, said trough being adapted to contain water andhaving a lower cylindrical portion, a horizontal conveyor worm in saidtrough with its blades contacting said cylindrical portion of thelatter, said conveyor worm consisting of a twisted metal band. devoid ofany internal support, means to rotate said conveyor worm, and elevatormeans coupled to said worm to lift the ashes above the level of thewater in said trough at a point out of the range of said down-pipe andthen to discharge the ashes from said trough.

2. A device, as claimed in claim 1, comprising further two rollsarranged in and extending throughout said trough parallel to said wormand above the same to prevent upward displacement thereof in the trough.

3. A device for quenching ashes, cinders, slag and the like dischargedfrom a furnace comprising in combination a down-pipe, a trough disposedbelow said down-pipe, said trough being adapted to contain water andhaving a lower cylindrical portion and an upwardly inclined end portion,a horizontal conveyor worm in the main portion of said trough with itsblades contacting said cylindrical portion. means to rotate saidconveyor worm, and a second upwardly inclined conveyor worm in saidupwardly inclined trough portion, said second worm being coupled to thefirst one, and each of said worms consisting of a twisted metal banddevoid of any internal supp t- GEORG SCHWABACH.

